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Zheng Z, Jin J, Xu GK, et al. Highly Stable and Conductive Microcapsules for Enhancement of Joule Heating Performance. ACS Nano. 2016;10(4):4695-703doi: 10.1021/acsnano.6b01104.
Zheng, Z., Jin, J., Xu, G. K., Zou, J., Wais, U., Beckett, A., Heil, T., Higgins, S., Guan, L., Wang, Y., & Shchukin, D. (2016). Highly Stable and Conductive Microcapsules for Enhancement of Joule Heating Performance. ACS nano, 10(4), 4695-703. https://doi.org/10.1021/acsnano.6b01104
Zheng, Zhaoliang, et al. "Highly Stable and Conductive Microcapsules for Enhancement of Joule Heating Performance." ACS nano vol. 10,4 (2016): 4695-703. doi: https://doi.org/10.1021/acsnano.6b01104
Zheng Z, Jin J, Xu GK, Zou J, Wais U, Beckett A, Heil T, Higgins S, Guan L, Wang Y, Shchukin D. Highly Stable and Conductive Microcapsules for Enhancement of Joule Heating Performance. ACS Nano. 2016 Apr 26;10(4):4695-703. doi: 10.1021/acsnano.6b01104. Epub 2016 Mar 28. PMID: 27002594; PMCID: PMC4850502.
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ACS Nano. 2016 Apr 26;10(4):4695-703. doi: 10.1021/acsnano.6b01104. Epub 2016 Mar 28.

Highly Stable and Conductive Microcapsules for Enhancement of Joule Heating Performance.

ACS nano

Zhaoliang Zheng, Jidong Jin, Guang-Kui Xu, Jianli Zou, Ulrike Wais, Alison Beckett, Tobias Heil, Sean Higgins, Lunhui Guan, Ying Wang, Dmitry Shchukin

Affiliations

  1. Stephenson Institute for Renewable Energy and Department of Chemistry, University of Liverpool , Liverpool L69 7ZD, United Kingdom.
  2. Department of Electrical Engineering and Electronics, University of Liverpool , Liverpool L69 3GJ, United Kingdom.
  3. International Center for Applied Mechanics, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University , Xi'an 710049, China.
  4. EM Unit, Department of Cellular & Molecular Physiology, University of Liverpool , Liverpool L69 3BX, United Kingdom.
  5. Nanoinvestigation Centre at Liverpool, University of Liverpool , Liverpool L69 3GL, United Kingdom.
  6. Centre for Materials Discovery, University of Liverpool , Liverpool L69 7ZD, United Kingdom.
  7. Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou 350002, China.

PMID: 27002594 PMCID: PMC4850502 DOI: 10.1021/acsnano.6b01104

Abstract

Nanocarbons show great promise for establishing the next generation of Joule heating systems, but suffer from the limited maximum temperature due to precociously convective heat dissipation from electrothermal system to surrounding environment. Here we introduce a strategy to eliminate such convective heat transfer by inserting highly stable and conductive microcapsules into the electrothermal structures. The microcapsule is composed of encapsulated long-chain alkanes and graphene oxide/carbon nanotube hybrids as core and shell material, respectively. Multiform carbon nanotubes in the microspheres stabilize the capsule shell to resist volume-change-induced rupture during repeated heating/cooling process, and meanwhile enhance the thermal conductance of encapsulated alkanes which facilitates an expeditious heat exchange. The resulting microcapsules can be homogeneously incorporated in the nanocarbon-based electrothermal structures. At a dopant of 5%, the working temperature can be enhanced by 30% even at a low voltage and moderate temperature, which indicates a great value in daily household applications. Therefore, the stable and conductive microcapsule may serve as a versatile and valuable dopant for varieties of heat generation systems.

Keywords: carbon nanotube; electrothermal; emulsification; encapsulation; graphene oxide; microcapsule; nanocarbon hybrids; ultrasound

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